Calibrate works?

lib/opencv_processing/examples/HistogramSkinDetection/HistogramSkinDetection.pde

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+import gab.opencv.*;
+
+import org.opencv.core.Core;
+import org.opencv.core.Mat;
+import org.opencv.core.Size;
+import org.opencv.core.Point;
+import org.opencv.core.Scalar;
+import org.opencv.core.CvType;
+import org.opencv.imgproc.Imgproc;
+
+OpenCV opencv;
+PImage src,dst, hist, histMask;
+
+Mat skinHistogram;
+
+void setup(){
+  src = loadImage("test.jpg");
+  src.resize(src.width/2, 0);
+  size(src.width*2 + 256, src.height);
+  // third argument is: useColor
+  opencv = new OpenCV(this, src, true);  
+
+  skinHistogram = Mat.zeros(256, 256, CvType.CV_8UC1);
+  Core.ellipse(skinHistogram, new Point(113.0, 155.6), new Size(40.0, 25.2), 43.0, 0.0, 360.0, new Scalar(255, 255, 255), Core.FILLED);
+
+ histMask = createImage(256,256, ARGB);
+ opencv.toPImage(skinHistogram, histMask);
+ hist = loadImage("cb-cr.png");
+ hist.blend(histMask, 0,0,256,256,0,0,256,256, ADD);
+ 
+ dst = opencv.getOutput();
+ dst.loadPixels();
+ 
+ for(int i = 0; i < dst.pixels.length; i++){
+    
+    Mat input = new Mat(new Size(1, 1), CvType.CV_8UC3);
+    input.setTo(colorToScalar(dst.pixels[i]));
+    Mat output = opencv.imitate(input);
+    Imgproc.cvtColor(input, output, Imgproc.COLOR_BGR2YCrCb );
+    double[] inputComponents = output.get(0,0);
+    if(skinHistogram.get((int)inputComponents[1], (int)inputComponents[2])[0] > 0){
+      dst.pixels[i] = color(255);
+    } else {
+      dst.pixels[i] = color(0);
+    }
+ }
+ 
+ dst.updatePixels();
+}
+
+ // in BGR
+Scalar colorToScalar(color c){
+  return new Scalar(blue(c), green(c), red(c));
+}
+
+
+void draw(){
+  image(src,0,0);
+  image(dst, src.width, 0);
+  image(hist, src.width*2, 0);
+}